| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that, in a conventional structure, a diffusion film or a prism sheet is provided on an emission surface side of a light guide plate, which is a hindrance to thinning, cost reduction or higher luminance, and also, in a structure forming a microprism in a light guide body, there is difficulty in enlarging. <P>SOLUTION: A recess is formed on a light input surface of the light guide plate so as to face the light source, and a paraboloid extending in a parabolic pattern in a light output direction from a light output part of the light source is connected to the light input surface. Prisms arranged on a light emission surface of the light guide body are disposed up to an area as closest to the light source as possible. <P>COPYRIGHT: (C)2010,JPO&INPIT |
